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11 April, 09:24

How much energy (in Joules) is released when 12.0 g of water cools from 20.0 °C to 11.0 °C? This is a grade 10 question from the Climate unit (from Canada)

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  1. 11 April, 09:31
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    Answer: - 452.088joule

    Explanation:

    Given the following:

    Mass of water = 12g

    Change in temperature (Dt) = (11 - 20) °C = - 9°C

    Specific heats capacity of water (c) = 4.186j/g°C

    Q = mcDt

    Where Q = quantity of heat

    Q = 12g * 4.186j/g°C * - 9°C

    Q = - 452.088joule
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